{"id":241229,"date":"2023-01-23T21:59:58","date_gmt":"2023-01-23T20:59:58","guid":{"rendered":"https:\/\/climatescience.press\/?p=241229"},"modified":"2023-01-23T22:00:06","modified_gmt":"2023-01-23T21:00:06","slug":"warmth-limits-for-tree-growth-affirm-austria-was-4-7c-warmer-than-today-2000-years-ago","status":"publish","type":"post","link":"https:\/\/climatescience.press\/?p=241229","title":{"rendered":"Warmth Limits For Tree Growth Affirm Austria Was 4-7\u00b0C Warmer Than Today 2000 Years Ago"},"content":{"rendered":"\n
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From NoTricksZone<\/a><\/p>\n\n\n\n

By Kenneth Richard<\/a> on <\/em>23. January 2023<\/p>\n\n\n\n

Robust evidence from bison remains recovered from the Austrian Alps in 2020 and 2021 invalidate claims modern Alpine temperatures are unusually warm. <\/strong><\/h4>\n\n\n\n

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A new study<\/a><\/strong> suggests that from about 6000 to 1200 years ago European bison fed on deciduous tree\/vegetation that grew at Alpine altitudes reaching around 800 m higher than they do today.<\/p>\n\n\n\n

Known beech and oak tree growth warmth thresholds \u2013 the required number of days per year above a minimum temperature limit \u2013 thus affirm Austria needed to be 4-7\u00b0C warmer than now during this period (~2000 years ago).<\/p>\n\n\n\n

\u201c[T]he beech limit but also the forest line during the \u00bbwisent time\u00ab (6,000 to 1,200 years before today<\/strong>) was much higher and the average summer temperature had to be at least 3 to 6 \u00b0C higher than today<\/strong>. Remarkable is a palynological record (Ressl, 1980) from the shaft cave Stainzerkogelschaft near Lunz am See. Remains of wisent were found in the shaft (1,463 m, see Tab. 3). The clay with a skull fragment with horncores inside was examined palynologically. The dominating pollen were from alder (Alnus), oak (Quercus) and linden tree (Tilia). The oak boundary<\/strong> (boundary between colline and montane vegetation stages) today lies between 400 and 800 metres in the Northern Alpine Alps<\/strong> (Grabherr et al., 2004). Oaks (Quercus) at an altitude of 1,450 metres around<\/strong> 2,000 years ago also indicate a climate approximately 4 to 7 \u00b0C warmer than today<\/strong>.\u201d<\/em><\/h6>\n\n\n
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Image Source:\u00a0Schaer et al., 2022<\/a><\/strong><\/h6>\n\n\n\n

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